Filtering special characters for URL segments

[eluser]Christophe28[/eluser]
Hi,

I'm aware of the config permitted uri chars, but for security reasons I don't want to edit those.

I just gave a url example. My url is different

But like said, I search a nice PHP function which filters every character, except a-z, 0-9, -, _ Does anybody knows a function like this or a regex?

Christophe